Lock construction



3 Sheets-Sheet l W. T. KNIESZNER LOCK CONSTRUCTION Filed Nov. 11, 1929 Aug. 22, 1933.

Aug. 22, 1933.

w'. T. KNlEszNER LOCK CONSTRUCTION Filed Nov. 11.4 1929 3 Sheets-Sheet 2 Aug. v.22, 1933. w. T. KNlEszNER 1,923,443

Locx CONSTRUCTION Filed Nov. 11, 1929 s sneetsfsheet 3 35 INVEN o R -/(6 BY Y gaf/Wy,

VJ Figure 7 is a View eifel-Hal" t0 @het Of Figui-"e 2, extending into suitable bores formed in the up- YPatenti-id Ang. 22, i933 Y v Y .f

1,923,443 LOCK CONSTRUCTION William T. Inieszner, New York, N. Y., assigner to Franeis Keil & Son, Inc., a Corporation of New York Application November 11, 1929 Serial No. 406,184

19` Claims. (C1. '1o-46) This invention relates to lock Construction and y Figure 9 is a lvertical sectional view, as seen more Aparticularly to lock construction for use on along the line 9-9 of Figure 4; doors, and the like. Figure l@ is a rear View with the back cover re- One of the objects of this invention is to promoved of a possible modified form, the keeper be- 5 vide asimple, rugged and thoroughly practical ing omitted ior the sake of simplicity; 00

mechanism for fastening a door, or lthe like, in Figure 11 is a rear View showing certain feaclosed position, capable of rapid and inexpensive tures of the cover construction and indicatinanufacture, and capable of reliable and eilicient ing the relation of certain of the `parts with the action. Another object is to provide a construcbote in extended IJOSGH; tion of the above-mentioned character in which Figure 12 is a sectional View along lthe line 50 the individual parts may be of simple construction `3"---12 Gf Fflle 1U; Y and capable of rapid assernbly. Another object Figure 13 is a vertical longitudinal Vsectional is to provide a lock construction having a rotary View, eS Seen 910112' h'ellle 13-13 Of Figure 10i r bolt or bolts and to provide bolt-extending and Figure 14 is a perspective View fonk a smaller 70 rotating mechanism that will be of'siniple and Seele Of One Of the lels Seen 1I1 plelfleln Flginexpensive construction and thoroughly depend Ure ,10, and i i able `in action. Another object is t@ provide a Figure 15 is a fragmentary sectional View, as

rotary holt lock construction in which forced reeee'fl'e-elg @he llfle 15-15 0f Fgule 10.

verse rotation of the extended bolt or bolts is made Similar Teferelee Characters refer lto similar impossible and, moreove, by a mehansm that parte throughout the several viewsin the draw- 7" will be free from cumbersome or expensive coi. le- Y piieation. other objects will' te in part obvious Referring new t0 the drawings and more par- Oy in part minted out hgfginafter, ticularly to Figures I, Zand 4, there is generally The invention accordingly consists in the feaindicated et 20 a CeSrlg open at its rear and protures of construction, combinations of elements, Vide@- l'elly -Wh Suitable lugs 21l (Fig. 4)

and arrangements of parts as will be exemplified against which may Test l @over 1013i@ .22 (Fg- 6) in the structure to be hereinafter described and and im@ Whh 31'@ l'lea'fled the @UWT-Seflllng the scope of the application of which will be indi- Serewe 23. 'leiht-aile Wall of ,the `Casing, as

90 cated in the i011 @Wing C1aim5- viewed 1n Figures 1, 2 and 4, 1s provided with two 5 In the accompanying drawings in which are openings shaped substantially as shown at 24 and i shown several of various possible embodiments of 25 in Figure 35 m95@ Openings Wm be Seen to have his invent- Enr arcuate or circular portions and lateral exten- Figure 1 is a front elevation oi the lockfmechasions therefrom and @hey are adapted t0 Te" o nisni associated with a keeper, the parts being Cei-Ve the left'hand ends 0f bGtS .26 and-271 Te* shown in. the relation they have when applied Spectleyf the 001155 being preferably substan- O .a door; i tially cylindrical and having at their left-hand Figure 2 is a rear view with the back cover vof end-S lateral projections 26a and 27h respectively the casing removed, thus showing the assembled (See also Fig' 9)' The Curved O1' roundedpor' Y mechanism; Y Y tionsV oi the openings 2e and 25 are adapted to 40 Figure gis .om end elevation as geen from the contact with and guide the cylindrical portions Left of Fgueg; of the bolts 26 and 27 as the latter are extended Fgue l S a ma? View with the back @over re and rotated, while the lateral extensions of the moved showing the relation of the parts with the Opemngs 4 and 25 are adapted to house the lat' eral lugs 26a, 26h and 27a, 27h of the bolts when ab oolts extended rotated into the keeper,

v. v tne latter are 1n withdrawn position, as shown 1n figure 5 is a vertical `sectional View as seen om the rhet-5` nf F 1 2Y Flgums? and 3' E ;Q lglr. The right-hand portions of the bolts 26 Aand 27 (1i-l n11V o is a ver ical sectional View, `seen (Fig. 2) are' pefembly of reduced diameter, as LOP-9 me 1m@ 6*@ o* Flgufe 2 at 26C and 27C, these reduced portions 26c and 27 certain parts, however, being broken away in order Standing lugs 28 and' 29,` respectively, of a slidjto show certain other features oi the construction ing platek guided i011 movement in a horizontal more clearly; direction, as'viewed in Figure 2, in suitable ways Figure 8 is a vertical sectional view,- as seen Zoe'and 2Gb (Fig. 5) extending lengthwise along along the line 8-8 of Figure 2;

110 the interior or thecasing 20.Y f

The front wall 2()C of the casing 26, as viewed in Figure l, (the bottom wall, as seen in Figure 2,

or the left-hand wall, as seen in Figure 6) hasv formed therein two grooves, generally indicated at 31 and S2 (see also Fig. 7), the former subf stantially underneath thebolt 26 andthe latter substantially underneath the bolt l27, as viewed in Figure 2. The groove 31 has a portion El extending lengthwise of the casing and hence in the same direction,substantially as the `direction in which the plate 3() slides andthe bol'tsare 'to move. Groove 32 has a similar portion 32a. e

Toward its left-hand end the groovel has a vportion Sib extending at .a substantial angle to the portion 31a, preferably merging gradually by appropriate curvature into the portion 311.

l Groove has a similar portion 321.

Bolt 2 6 is provided with a pin 33 suitably'secured thereto and shaped to extend into the groove 31 (see Fig.. 6). Bolt 27 has a pin 34 projecting therefrom and extending into the groove relation or the parts is clearly shown in Figure 6. Q

- Rotatably mounted in the front wall c of the casing 20 (see Fig. 5) is a manually operable knob 39 terminating uponl the interior of the casing in a crank 40 (Figs. 1,4 and'l) The crank arm has a crank pin 41 extending through a transverse slot 3Da (Figs. 1, 4 and 7) Ain the sliding plate 30 and into a transversely slidable member 42 (Figs. 2 and 4) carried by the sliding plate 30 and guided for transverse slidingmovement by means of suitably spaced flanges 43` and 44 (Figs. 2 and 4) con*-V veniently integrally formed with the plate 30.

I The transversely sliding member 42 is bent or shaped, as is indicated at 422L in Figure 5, so as to be engaged by a spring 45 (Figs. 2 and 4) ffcoiled about a spring 46 carried by the sliding plate, its

other end abutting against thek lug 29. Y The-spring 45 tends to urge the slide member 42 downwardly,

as viewedin Figures 2, 4 and 5.

The Vslide membery 42 is of such a length that,

when in either of the extreme positions of the other parts, as shown in Figures 2 and 4, the member 42 projects laterally ofthe sliding plate 30, and may be seated either Vin the recess 46, as in Figure 2, or in the recess 47, as in Figure 4, formed on the interior of the. side wall of the casing 20,

'and forming an abutment 48 between recesses.

Considering now the operation of the mechanism, it may iirst be pointed out that the parts occupy the position shown in Figure 2 when the bolts are withdrawn.` The spring 45 holds the slide member 42 in the recess 46. and hence to the right of the abutment 48, the member 42 thus preventing any movement of the slide or of the parts associated therewith, the bolts 26 and 27 being effectively tied, as it were, to the plate 30 by means of the links and 36,. These links thus prevent relativeV movement between the bolts and the plate 30. A i

Also, the crank 4()v (see Fig.r l) is held so thatthe axis of the knob 39 and the vaxis of the crank-41 are in substantially the same line as 'the line of movement of the sliding plate 30, and the parts being thus ondead center, the crank also acts to prevent movement of the slide V30.

Pivotally secured to the left-hand portion ofV lUnder these conditions, also, the left-hand endsy of the bolts, together with the lateral projections thereon, are housed in the openings 24 and 25 of the left-hand end Wall of the casing V2).

If now the knob 39 is rotated in counter-clockwise direction, as viewed in Figure 1, kthe crank Apin 41 moves the slide member 42 upwardly,

viewed in Figure 2, andhence moves it out di" the recess 46, Continued movement of the crank arm v .40l commencing a movement oi translation, Yina direction toward the left, of the slide plate 30, as

' (Fg. 6) thereof move along the portions 31@ and respectively, of the grooves or slots 31-32, respectively. A Y

As the pins approach the left-hand ends of the portions 3la and 32e of the grooveszSl andf32, the curvature of the merging portions 31D and 321 of the groovesQunder the force transmitted to the pins 33 rand 34 through the links 35 and 36, `respectively, the latter, during the initial movement, being at a substantial angle to eachother, as is clear from Figures 1 and 2, cause the pins 33 and 34 to be swung about the axes of theb'olts 26 and 27,respectively, yand thus commence the rotation of thebolts themselves.

As the rotation of the bolts proceeds, the angle which the'links 35 and 36 makes to the` direction of movement of the sliding plate 30 continually increases, thus likewise increasing the rotational efect upon the bolts of the force or forces which continue the movement of the sliding plate 30 in a direction toward the left, as viewed in Figures 2 and 4.

Y Also, as this angle increases from the relatively small angle, as ,indicated in Figure 2, relative movement takes placebetween thebolts and the sliding plate, suitable sleeves 26k and 27k on the bolts 26 and 27 abutting against the interior'face of theleft-hand end wall of the casing,'as shown inFigure 4, thus preventing further movement of Atranslation of the bolts themselves.

tinued movementtoward the left of the sliding plate 30. either under the control of the crank arm 40 or under the action of spring 45, bringing the partsv into the 'position shown in FigureVr 4, the plate 30 having been slid in a direction toward the left, and the lugs 28 and 29 thereon having been moved toward the left along the reduced portions 26c 'and 27c of the bolts, these lugs coming to rest substantially against the shoulders formed by the larger-diametered portions ofthe bolts.

The links 35v and S6 are, by the time the movement of the sliding plate 30 has terminated,

brought into a position such that the line'fcon-y necting their pivotal lconnections issubstantially and preferably exactly at rightangles to the linev along which the plate 30 is movable. These links thus positively hold the bolts'26 and 27 against rotation, any force applied to the bolts to tend to .unrotate them being vtransmitted through the links .tothe plate() in a'direction at right angles to' any possible movement ofthe plate 30, and thus no movement of the plate 30 can takejplace, and likewise no rotation of the bolts can take place.

The con- At the same time the crank arm 4() has moved v to another dead center position, as shown in Figure 4, and it acts to preventmovement topointed out that the flanges 26k and 27kv comeV to rest in a position abutting the inside face of the left-hand end wall of the casing and Vthat they thus prevent the bolts from being i'orceably pulled or forced further out of the casing. Howe ever, the lugs 28 and 29 (Figs. 2 and i) having been brought into abutting relation to the shoulders formed by the larger-diametered parts of the bolt, and these lugs 28 and 29 being carried by the locked plate 30, thus form solid abut-` ments resisting any tendency to force the bolts inwardly from the exterior.

In unlocking the device, the crank arm is given a rotation in a clockwise direction, as viewed in Figure Il, against the action of spring i5.V Initial movement of the crank l0 moves the slide member ll2 out of the recess 47 and con.- tinued movement thereof starts movement of the plate 3u in a direction toward the right, as viewed in Figure Il. This latter movement moves the pivot pins 37 and 38 of the links 35 and 36 toward the right, breaking the preferred 90 angle above-mentioned and, in effect, forcing the pins 33 and 34 to follow the portions Bib and 32h of the grooves. 3l and '32, respectively, (Fig. 2) thus unrotating the bolts.` During the movement the lugs 28 andv 29 slide along the portions 26c and 27C, respectively, of Vthe bolts. By the time the pins 33 and 34 have completed traverse of the substantially transverse portions of the grooves 3l and 32 respectively, the lugged head ends of the bolts have been brought into alinernent with the greater dimension of the opening in the keeper 51. so that the withdrawal oiv the bolts from the keeper may then proceed or continue.

Continued rotation of the crank armvll) in clockwise direction, as viewed in Figure 4, causes the plate 30 and the bolts and 27 to move in a direction toward the right; as a unit, the pins 33 and 34 on the bolts moving` along the por tions 3lEL and 32a, respectively, of the slots or grooves 3ll and 32. The `bolts brought to a position of rest, substantially as shown in Fig ures l, 2 and 7, in which. the crank 'i0 has again assumed a dead. center position and the transverse slidable member 42 positioned to the right of the abutment 48 and inserted in the 'recess i6 (Fig. 2). The spring ll5 insures the completion of movement of the parts into the position shown in Figure 2.`

The cover plate 22 (Figs. 5 and 6) :has rotata` bly mounted therein a crank 52 adapted to be rotated by a connecting bar 53 operatively related to the key cylinder 5i and operatedunder the control of a key 55. The crank 52 is provided with a crank pin 55 which, when rotated by the key, is adapted to engage the projecting portion li2erof the transversely slidable member 42, thus moving v the latter out of whichever recess 47 or le (Figs. l and 2) that the latter may be in, the crank pin 56 t ereafter riding and sliding in between the portions 43e and 44e of the flanges i3 fie formed on the sliding plate 30, thus actuating the crank arm 40, the slide plate 30, and related parts, in a manner that y of a sheet metal stamping and has punched and.'

will now be clear in View of all of the foregoing.

Certain features of the manner of assembly of the abovedescribed parts may now be briefly pointed out. Considering first the links 35 and 36, I prefer to have these links rest against the` interior face 201 of thefront wall 20c of the casu ing 2() (see Figs. 5, 6, 7 ande), this face 2i)i being spaced away from thev guiding portions 20u/and 2Gb by a distance substantially equal to the thickness of the links 35 and 36. The right-hand endsv of the links. as viewed in Figure 2. Athus extend underneath the left-handportion of the plate 30. The pins 37. and 38 (Fig. 2) are either cast integrally with the plate 30 or are rigidlysecured thereto, and extend freely into suitable openings in the right-hand ends of the links 35 and 36. The pins 33 and 34 (Figs. 6 and 8) on the bolts 26 and 27. respectively, simply extend through the openings in the left-hand ends of the links and into the grooves 3l and 32. respectively. The lugs 28 and 29 on the sliding plate 30 are of sufficient extent as to be substantially contacted by the cover plate 22 when the latter is put in place, as is seen in Figure 6. while at the right-hand end of the plate 30. the latter is provided with suitable upstanding portions Sflf and 30g (Fig. 5)v to justl about engage the` cover plate 22 when the latter is put in place. Y

The parts are assembledas above described, with respect to the links 35 and 35. the reduced diametered portions 26C and 27c of the bolts being passed into the lugs 28 and 29 on the sliding plate. The parts having been thus inserted into the casing, the crank pin. 41, preferably in the form of a screw. is passed through the sliding member 42 and into the crank ill. cover plate is then put in position, appropriately relating the key-operated crank 52 to the member 42 and the cover plate secured in position. as by the The various mechanisms,

screws 23l (Fig. 6). while being freely slidable or movable relative to one another. are dependably held in assembled relation. by the cover-plate itself. To take the mechanic. i apart. it is simply necessary to rel... move the cover plate. and the crank pin/i1.

whence the various parts are readily removed from the casing andremovedfrom'. each other.

In Figures lll-l5 I have strateda possible modiiication of my invention... adaptedto achieve certain additional advantages. bolts and 27. provided withthe projecting lugs at'their head ends, as hereinabove described. are preferably of the saine diameter throughout. areguided in part by the rounded portions of the openings 24 and 25 in the left-hand endwall of the casing 2f) and in part. also, by arcuate portions 20k (Fig. 15) preferably cast with or otherwise formed upon the interior of the casing 20.

These arcuate seats 26k are of about 92 extent but. in a direction hold the vbody portions proper of the two links away from theface 2N, interposing between the two sufficient space into which the bolt pins 33 and 34 may project.

The slidingplate 30 ris preferably in the form bent downwardly (Figs. 14 and `13) two lugs 63 which extend into and through suitable recesses inthe right-hand ends of the links and 35, respectively. A spring 64 is coiled about a pin 65 (Figl) and has two arms extending toward the left .and into engagement with the bolt pins. `33 and 34 (see Fig. 12)-the spring acting to yieldinglyvurge the two spring arms, and hence theA boltl pins, away from each other, as viewed in Figureslc and-12, and thus oausingthe'links to tend to separate or swing away from each other, as viewedin Figure 10, about the axes of the lugs 63 and 64. The spring'64 thus also insures that the left-hand ends of the links 35 and 36, and hence the bolt pins 33 and 34,-fol1owthe guiding portions 2013 (Fig. 10). v l AThe sliding plate, as is better `shown in Figure 14, is bent tol provide longitudinally extending side flanges 66 and` 67 of suilicientextent to be barely engaged by the cover plate. 68 (Fig. 13) when the latter is put in place and secured in position as by the screws 69 which hold the plate against suitable lugs 7'() (Fig. l0) castinto the inside of the casing 20.

The plate Bohas also out `and bent or stamped out of its` main portion two transversely extending guiding flanges 71 and72and a transversely extending slot 73. Between thetwo flanges 71 and V72 there isslidably mounted and guidedthe transversely slidable member 42, shaped substantially ask described in connection Ywith Figures 1-9, and operated upon by Ka suitable spring 74 (Figs. 10 and 13). The crank 40,` operatedby the knobv 39, extends into. the'casingiZO (see Fig. 13) and a crank pin inthe form of a screw 75 passes through the slidable member 42 and `into the crank 40. V Y

Thus, as the crank u4() is swung in counterclockwise direction, as viewed inlFigure 10, the slidable member 42 is lifted out ofthe recess 46 in the inside of the casing, the lsliding plate 30 is moved to the left, the bolts 26 and .27. being extended out of the casing by the links 35 and 36 which, as above pointed out, connect the bolts to the sliding plate'BO. A' y l.

During this movement the spring 64 causes the left-hand ends of the links 35V and 36 to be moved along the straight portions of the guiding parts k261 and as the movement continues, the spring causes these portions of the links, and hence also the bolt pins-33 and 34, to follow the curved portions of the parts 2Op (Fig. 10), causing the links to swing away from each otherand the bolts to rotate. The parts are so proportioned that the .rotation of the bolts, preferably-does not commence until the bolts have been well extended into the keeper. 5l (Fig. 9). As this movement is completed, the crank 40,

`- assumes a new deadv center position, locking the plate 30 against movement in a direction toward' the left orright, theslide member 42 is seated yin the recess 47 and to the left of the abutment 48 on the inside of the casing, thus further locking the plate 3() against' movement; while the links 35.and 35 will have assumed the positions shown indotted lines in Figure` 10, the lines connecting the pivot points of these links, extending preferablyat right-angles to the line of movement of the sliding plate 30 itself.

To vunlock the mechanism, the crank isrotated in reverse direction, lifting the slide member 42 out of the recess 47 vand also moving the crank 4i) out of its dead center position; initial movement'brings the links 35 and-36 out of ,alinement,thus unrotating the bolts. while continued movement is accompanied by continued rotation and withdrawal of the bolts out of the keeper, final completion of the movement being accompanied by withdrawal of the bolts into the casing. The crank arm 40 moves to the dead center position shown in Figure l() and the slide member 42 becomes seated in the recess 46, thus locking the vparts in unlocked position.

A key-operated connecting bar 53, operable through a key cylinder 54'and key 55, as in Figure 5, extends into and connects with the crank .52 (Fig.,i3) yrotatably carried inl the plate cover 68 and provided with a crank pin 56 adapted to coact with the portion 4.2il of the slide member 42 and to slide in between and be guided by the flanges 7l and 72. rIhus, the mechanism may be `actuated under the-control of the key, in a manof the cover plate 53, the plate 30 being guided by suitable portions 20a and 2Gb, similarly as in Figure 5. f y

The cover plate 68. has stamped and bent inwardly suitable number of portions 68a and 58h, preferably two for eachbolt (see Figs. 11 and 12) the inner ends of these portions having the same radius of curvature as the bolts themselves, and coacting withthe portions 2l)k (Fig. 15) to provide bearings and guides fory the rotating and sliding bolts. l The assembly of the partswill be clear from thek above but it might here be pointed out that the modified form immediately above described lends `itself to rapid and `inexpensive manufacture, many of the parts being capable of embodiment in the form of sheet metal stampings and thus having many `advz-tntages in the way of achieving economy of manufacture, all without sacrice of dependabilty of operation.

It will thus be seen -that there has been provided in this invention a lock construction in 'which the various objects hereinbefore set forth,

together with many thoroughly practical advantages areV successfully achieved. It will be seen that the construction is well adaptedfor manufacture lon a large scale and well adapted to meet the varying conditions of hard practical use.

Asvmanypossible embodiments may be made of .the above invention and as many changes might be made in the embodiment above set forth, it is to be understood that all matter hereinbefore set forth or shown in the accompanying drawings, is to be interpreted as illustrative and not-in a limiting sense.

I claim: d 1. In a construction of the class described, in combination, a casing, a boltl extendable out of said casing and rotatable about an axis extending substantially in the direction of extending moveguiding means adapted to permit said link, upon x substantial completion of the extension of said bolt, to assume a position such that the line connecting said pins extends substantially at right angles to the line of member.

movement of Y said vsliding v 2'. In a construction of the' class described, in combination, a casing, a bolt extendable out of said casing and rotatable about an axis extending substantially in the direction of extending movement of said bolt, a pin projecting from said bolt, a member guided by said casing for movement in the direction of extension oi said bolt and having a pin projecting therefrom, means for operating said sliding member, a link connecting said slidable ibcr with said bolt and having the pins thereoiv extending tliereinto, and guiding :A in theform of a groove formed in said casing having said bolt pin exten` "pinto, said groove having a portion extend l the general direction of extending moveme d bolt and a portion extending at an angle eretto, said lastmentioned portion being of sufficient extent to permit said link, when bolt is completely extended, toassume a position such that the line joining the two pins extends substantially at right angles to the line oi extending movement of said bolt.

.3. In a construction of the class described, in combination, a casing, a bolt extendable out of ig and rotatable about extending substantially' the direction of extending movebolt, a pin projecting from bolt, a link having pivotal connection at one end 1l ereof with said pin, a rotary operating memcer, means forming a connection between said member the other end oi saio. link for transmitting bolt-extending movement to said bolt through said link, and means for causing a change in the angular relation. be Ween the link and line or morement oi saidbolt to take place said bolt is extended.

ll. In a construction the clase described, iM combination, a cash" a bolt extendable out or said and rotanti` le about an extending substantially in i extending mo'veinentcr said bolt, a pinproiecting from said boit, a link having pivotal connection at one end thereof with said pin, a rotary operatingrnember, means forniin a 'corn the o er er or said link for transtending :no ic-nt to bolt rough l ik, and me for causing said link to assu. o a .Substantially inline with thc direct;x ry movement of said pin when the bolt isili extended position. 1

n 5. In a construction of the class described, in combination, a casing, a bolt extendable out of said casing and rotatable about an axis extending substantially in the direction of extending move-Y ment .of said bolt, a pin vprojecting from said bolt, a link having pivotal connection at one end thereof with said pin, a rotary operating member, means forming a connection between said member and the other end of said link for" transmitting bolt-extending movement to said bolt through said link, and i ieans for determining the and extent of rotary movement of said bolt as thelatter is extended,V said means being constructed to cause said link tok assume a position extending substantially in line with the direction of rotary movement of said pin when the bolt is completely extended.

6. In a construction of the class described, in combination, a casing, a bolt extendable out of said casing and rotatable about an axis extending substantially in the direction of extending movement of said bolt, a pin projecting from said bolt, a link having pivotal connection at one end thereof with said pin, a rotary operating member, means forming a connection between said memection between said ber and the other end of said link for transmitting bolt-extending movement to said bolt through said link, and guiding means for said pin, said guiding means having a portion extending in the general direction of extending movement of said bolt and another portion extending at an angle thereto, said last-mentioned portion 'i In a construction of the class described, in

combination, a casing, a pair of bolts extendableV out of' said casing and rotatable about Van axis substantially coincident with the direction of extending movement thereof, a pair of links each pivotaliy connectedat one end thereof to one of said bolts, and means for giving a movement of translation to the other ends of said links, thereby to extend the bolts, and to cause said links to assume ultimate positions substantially at right angles to the direction of extending movement of said bolts/When the latter are substantially entirely extended.

8. In a construction of the class described, in combination, a casing, a pair of bolts extendable out of said casing and rotatable about an axis substantially coincident with the direction of extending movement thereof, a pair of links each pivotally secured to one of said bolts, 'movable means joining the other ends oi? said links, and means acting `in response to movement of said movable means for ultimately positioning said links in substantial alinement with each other.

9. In a construction of the class described, in combination, a casing, a bolt extendable out oi said casingY and rotatable about an axis substantially coincident with the direction of extending movement thereof, a sliding plate within said casing and having a connection with one end of said bolt adapted rotatably to support said end of said bolt while permitting relative movementY ibi) therebetween in the direction of the axis of said bolt, a link pivotally connected at one end to said bolt and at the other end thereof to said sliding plate, and means permitting rotation of the bolt and relative movement between saidbolt and said sliding plate to take place only after a predetervmined movement of projection of said bolt has bolt adapted rotatably to support said end of'saidY bolt while permittingrelative'movement .therebetween in the direction Aof the axis of said bolt, aI

link pivotally connected at one end to said boltv and at the other end thereof to saidvslidingplate, and means permitting rotation'of the boltand relative movement between said bolt and said sliding plate to take place only after a predetermined movement of .projection of said bolt has taken place, said means permitting said link to assume a position substantially at right angles to the line of movement of said bolt when the-latter is substantially extended.`

il. In a construction of the class described, in

combination, a casing, a' bolt extendable out of said casing and rotatable about an axis substantially coincident with the direction vof extending movement thereof, a sliding plate Within said cascombination, a casing,

ing and havinga connection with one end of said bolt adapted rotatably to support said end of said bolt while' permittingrelative movement therebe- Y tween in the direction of the axis of said bolt, a link pivotallsT connected at onerend ,to said bolt and at the'other end thereof to said sliding plate, and means permitting rotation of the bolt and relative movement between said bolt and said sliding plate to take place'only after a predetermined movement of projection of said bolt has taken place, said means including a. projecting portion on the bolt and guiding means formed in said casing coasting therewith and permitting Vsuch a range of rotary movement ofA said bolt that said link, when said bolt is substantially fully extended, assumes a position substantially at right angles to the direction ci projecting movement of said bolt.

12. In a construction of thefclass described, in combination,` a casing, a boltextendable out of said casing and rotatable about an axis extending substantially in the directionrof extending movement of saidbOlt, said bolt having'a shoulder vintermediate its l a movable member within said casing ai ning abearing for rotatably and slidablyV supporting that portion of the bolt innermost or" said shoulder, meanscausing said movable member andsaid bolt to move together and then to causes-aid movable member to movev lengthwise of portion of said bolt, means responsive to said last-mentioned movement of said movablemember to rotate said bolt, and means for locking saidmovable member in position. v Y

13. In a construction of the class described, in combination, a casing, a bolt extendable out of said casing and rotatable about an axisextending substantially in the direction ci extending movement of said bolt, a link pivotally connected to said bolt `to rotate said bolt, meansadapted to cause said link to move to a dead center position when said bolt has been extended and rotated, and vmeans for preventing movement oi `said link out of dead center'position and including a rotatable member movable into deadcenter position.

ing substantially in the Ydirection of'extending` movement of said bolt, toggle means for veiecting rotation oi? said bolt upon extensionY thereoi'vand adapted to assume a deadcenter position, and means movable to dead center position for preventing breaking of said toggle out oi'jdead center position. n Y 1 15. In a construction or" the class described, in ci bolts extendable out" ciV said casingand rotatable about an axis substantially '4 coincident with the direction oi extending movement thereof, two pivotally connected links each pivotally connected to one of 14:. In a construction of the class described, in`

said bolts for effecting rotation of said bolts when the latter are out ofsaid casing and adapted to be moved into such a position that their longitudinal axesextend at right angles to the direction of extending movement of said bolts, thereby to prevent'reverse rotation of the bolts, and means including a crank arm movable to dead center position for holding said links in straightline relation.

16; In a construction of the classA described, in combination, a casing, a pair of bolts extendable out of said casing and rotatable about an axis substantially coincident with the direction oi extending movement thereof, a pivotally connected member for rotating each bolt and adapted to be f Ymoved to dead center position to prevent reverse rotation of its associated bolt, and means movable to dead center. position for preventing movementof said members out of dead center position.

17. In a construction of the class described, in combination, acasing, a bolt extendable out of said casing and rotatable about an axis extending substantially in the direction of extending movement of said bolt, a pin projecting from said bolt and toward a wall oi said casing, a movable member guided by the interior of said casing and having a pin projecting toward said wall of said casing, a link having two openings, each for the reception of one of said pins, said link being positioned adjacent .said wall or" said casing, and

means including a cover plate for said casing for holding said parts in assembled relation.

18. In a construction of the class described, in combination, a casing, a bolt extendable out of said'casing and rotatable about an axis extending substantialb1 inthe direction of extending movement of said bolt, said bolt having a shoulder intermediate' its length, a movable member within said casing `and forming a bearing for rotatably and Vslidably supporting that'portion of the bolt innermost of said shoulder, means causing said movable member and said bolt to move together and then to cause said movable member to move lengthwise of said portion of said bolt into abutting relation to said' shoulder,Y means functioning f duringa laterportion of the movement of said movable `member `for rotating said bolt, andY means'for locking said movable member against retrograde movement and thereby to hold it in abutting relationto the shoulder on said bolt.

`19. In a construction oi the 'class described, in

combination, a' casing, a rotatable and'exten'dable bolt therein, means adapted upon actuation to extend and rotate said bolt ,and 'constructed to assume a dead center position onthe completion of its actuation, and rotary means for actuating WILLIAM T. KNIESZNER. v 

